GLACIOTECTONIC DEFORMATION DURING THE ELSTERIAN ICE-SHEET ADVANCE AT THE NORTHEASTERN MARGIN OF THE SUDETIC FORELAND, SW POLAND

The glaciotectonic deformations near the northeastern margin of the Su detic Foreland, SW Poland, were formed during one glacial episode. The y are relatively small and are truncated. Deformation structures have no recognizable relationship to the thick Neogene clay in the basement ; they have variable relations to the morphology and indicate transver se to opposite directions of the glacial push in very small areas with in a distance of 2 to 5 km. This suggests an unusual deformational his tory. Deformations have probably been created due to shearing en masse of the anisotropic sediments and during the ice-sheet advance. Deform ation structures have been formed st few kilometres ahead of the curve d ice margin, which created glaciotectonic hills' with strongly differ entiated orientations of thrust structures and folds.